Her attorney says Texan Anna Nicole Smith died Thursday after collapsing at a Miami-area hotel and being rushed to the hospital.
The model and celebrity collapsed while at the Seminole Hard Rock Cafe Hotel and Casino in Hollywood, Florida, where she had been a guest since Monday.
Smith earlier this month drew attention after she and TrimSpa were sued in a class-action lawsuit alleging their marketing of a weight-loss pill is false or misleading.
Smith had endorsed TrimSpa and was a spokeswoman.
Smith also spent several years in a legal battle over her late husband's fortunes.
At issue is the will of Houston oil tycoon J. Howard Marshall the third, who died in 1995 at age 90, one year after the couple married. Smith was 26 when they wed.
Smith was from Mexia, Texas.
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